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1.
Ann Thorac Surg ; 115(6): 1494-1502, 2023 06.
Artículo en Inglés | MEDLINE | ID: mdl-35483424

RESUMEN

BACKGROUND: Sickle cell disease (SCD) is a hemoglobinopathy that can cause multiorgan dysfunction. This study assessed the perioperative outcomes of patients undergoing operations for congenital heart disease who had SCD or sickle cell trait (SCT). METHODS: We performed a retrospective review of patients with SCD or SCT who had records in The Society of Thoracic Surgeons Congenital Heart Surgery Database between 2014 and 2019. The primary outcome was operative mortality. Secondary outcomes included postoperative complications. One-to-one propensity score matching was performed between the SCD and SCT groups and the control group for further analysis. RESULTS: Our study population consisted of 73, 411, and 36 501 patients in the SCD, SCT, and control groups, respectively. Median (25%-75% interquartile range) age at surgery was 2.8 (0.4-9.7), 0.60 (0.2-3.1), and 0.70 (0.2-6.4) years in the SCD, SCT, and control cohorts, respectively. Operative mortality, surgery duration, cardiopulmonary bypass time, and cross-clamp time were not significantly different among the 3 groups. The SCD group had a higher rate of postsurgical cardiac arrest than its propensity score-matched control group (5.5% vs 0%, P < .05); otherwise, there were no statistically significant differences in the outcomes between the SCD and SCT groups and their respective matched control groups. CONCLUSIONS: Operative mortality after cardiothoracic procedures in patients with SCD or SCT appeared similar to our control patients. While these patients may require unique perioperative management, they can undergo cardiac surgery without an observed increase in mortality.


Asunto(s)
Anemia de Células Falciformes , Procedimientos Quirúrgicos Cardíacos , Cardiopatías Congénitas , Cirugía Torácica , Humanos , Anemia de Células Falciformes/complicaciones , Anemia de Células Falciformes/cirugía , Procedimientos Quirúrgicos Cardíacos/efectos adversos , Estudios Retrospectivos
2.
Cardiol Young ; 31(7): 1057-1188, 2021 Jul.
Artículo en Inglés | MEDLINE | ID: mdl-34323211

RESUMEN

Substantial progress has been made in the standardization of nomenclature for paediatric and congenital cardiac care. In 1936, Maude Abbott published her Atlas of Congenital Cardiac Disease, which was the first formal attempt to classify congenital heart disease. The International Paediatric and Congenital Cardiac Code (IPCCC) is now utilized worldwide and has most recently become the paediatric and congenital cardiac component of the Eleventh Revision of the International Classification of Diseases (ICD-11). The most recent publication of the IPCCC was in 2017. This manuscript provides an updated 2021 version of the IPCCC.The International Society for Nomenclature of Paediatric and Congenital Heart Disease (ISNPCHD), in collaboration with the World Health Organization (WHO), developed the paediatric and congenital cardiac nomenclature that is now within the eleventh version of the International Classification of Diseases (ICD-11). This unification of IPCCC and ICD-11 is the IPCCC ICD-11 Nomenclature and is the first time that the clinical nomenclature for paediatric and congenital cardiac care and the administrative nomenclature for paediatric and congenital cardiac care are harmonized. The resultant congenital cardiac component of ICD-11 was increased from 29 congenital cardiac codes in ICD-9 and 73 congenital cardiac codes in ICD-10 to 318 codes submitted by ISNPCHD through 2018 for incorporation into ICD-11. After these 318 terms were incorporated into ICD-11 in 2018, the WHO ICD-11 team added an additional 49 terms, some of which are acceptable legacy terms from ICD-10, while others provide greater granularity than the ISNPCHD thought was originally acceptable. Thus, the total number of paediatric and congenital cardiac terms in ICD-11 is 367. In this manuscript, we describe and review the terminology, hierarchy, and definitions of the IPCCC ICD-11 Nomenclature. This article, therefore, presents a global system of nomenclature for paediatric and congenital cardiac care that unifies clinical and administrative nomenclature.The members of ISNPCHD realize that the nomenclature published in this manuscript will continue to evolve. The version of the IPCCC that was published in 2017 has evolved and changed, and it is now replaced by this 2021 version. In the future, ISNPCHD will again publish updated versions of IPCCC, as IPCCC continues to evolve.


Asunto(s)
Cardiopatías Congénitas , Clasificación Internacional de Enfermedades , Niño , Femenino , Humanos , Sistema de Registros , Sociedades Médicas , Organización Mundial de la Salud
3.
World J Pediatr Congenit Heart Surg ; 12(5): E1-E18, 2021 09.
Artículo en Inglés | MEDLINE | ID: mdl-34304616

RESUMEN

Substantial progress has been made in the standardization of nomenclature for paediatric and congenital cardiac care. In 1936, Maude Abbott published her Atlas of Congenital Cardiac Disease, which was the first formal attempt to classify congenital heart disease. The International Paediatric and Congenital Cardiac Code (IPCCC) is now utilized worldwide and has most recently become the paediatric and congenital cardiac component of the Eleventh Revision of the International Classification of Diseases (ICD-11). The most recent publication of the IPCCC was in 2017. This manuscript provides an updated 2021 version of the IPCCC.The International Society for Nomenclature of Paediatric and Congenital Heart Disease (ISNPCHD), in collaboration with the World Health Organization (WHO), developed the paediatric and congenital cardiac nomenclature that is now within the eleventh version of the International Classification of Diseases (ICD-11). This unification of IPCCC and ICD-11 is the IPCCC ICD-11 Nomenclature and is the first time that the clinical nomenclature for paediatric and congenital cardiac care and the administrative nomenclature for paediatric and congenital cardiac care are harmonized. The resultant congenital cardiac component of ICD-11 was increased from 29 congenital cardiac codes in ICD-9 and 73 congenital cardiac codes in ICD-10 to 318 codes submitted by ISNPCHD through 2018 for incorporation into ICD-11. After these 318 terms were incorporated into ICD-11 in 2018, the WHO ICD-11 team added an additional 49 terms, some of which are acceptable legacy terms from ICD-10, while others provide greater granularity than the ISNPCHD thought was originally acceptable. Thus, the total number of paediatric and congenital cardiac terms in ICD-11 is 367. In this manuscript, we describe and review the terminology, hierarchy, and definitions of the IPCCC ICD-11 Nomenclature. This article, therefore, presents a global system of nomenclature for paediatric and congenital cardiac care that unifies clinical and administrative nomenclature.The members of ISNPCHD realize that the nomenclature published in this manuscript will continue to evolve. The version of the IPCCC that was published in 2017 has evolved and changed, and it is now replaced by this 2021 version. In the future, ISNPCHD will again publish updated versions of IPCCC, as IPCCC continues to evolve.


Asunto(s)
Cardiopatías Congénitas , Clasificación Internacional de Enfermedades , Niño , Femenino , Humanos , Sistema de Registros , Sociedades Médicas
4.
World J Pediatr Congenit Heart Surg ; 12(3): 433-436, 2021 May.
Artículo en Inglés | MEDLINE | ID: mdl-31088210

RESUMEN

Cardiac paraganglioma (PGL) is a rare catecholamine-secreting tumor forming 1% to 3% of cardiac tumors. Although most PGL occur sporadically, evidence exists that 40% of them may be related to familial cancer predisposition syndromes. We present a unique case of a 14-year-old female who presented with persistent hypertension and was found to have a cardiac PGL. During surgical resection, even though the main right coronary was preserved, the sinoatrial (SA) nodal artery was surrounded by the tumor and required resection with the tumor. The patient subsequently developed SA node dysfunction and is currently being evaluated for placement of a permanent pacemaker.


Asunto(s)
Neoplasias Cardíacas , Paraganglioma , Adolescente , Femenino , Neoplasias Cardíacas/diagnóstico por imagen , Neoplasias Cardíacas/cirugía , Humanos , Paraganglioma/diagnóstico por imagen , Paraganglioma/cirugía
5.
Cardiol Young ; 31(2): 300-302, 2021 Feb.
Artículo en Inglés | MEDLINE | ID: mdl-33140713

RESUMEN

Total anomalous pulmonary venous connection is a rare congenital heart defect. We report an infant with a mixed form of supracardiac TAPVC, in whom all pulmonary veins, except the right upper, entered a pulmonary venous confluence that is connected to a vertical vein and drained into the superior vena caval-right atrial junction. Several segmental right upper pulmonary veins entered the superior vena cava, superior to the entry of the vertical vein. Surgical repair consisted of the Warden procedure combined with direct anastomosis of the vertical vein to the left atrium. Separate pulmonary venous drainage pathways decreased the risk of post-operative pulmonary venous obstruction. Our patient had an uneventful post-operative course and encouraging 2-month follow-up echocardiography. Careful follow-up is warranted to detect post-operative complications, including obstruction of the pulmonary venous and cavoatrial anastomoses.


Asunto(s)
Cardiopatías Congénitas , Venas Pulmonares , Síndrome de Cimitarra , Atrios Cardíacos/diagnóstico por imagen , Atrios Cardíacos/cirugía , Cardiopatías Congénitas/diagnóstico por imagen , Cardiopatías Congénitas/cirugía , Humanos , Lactante , Venas Pulmonares/diagnóstico por imagen , Venas Pulmonares/cirugía , Síndrome de Cimitarra/diagnóstico por imagen , Síndrome de Cimitarra/cirugía , Vena Cava Superior/diagnóstico por imagen , Vena Cava Superior/cirugía
6.
Ann Thorac Surg ; 109(3): 835-841, 2020 03.
Artículo en Inglés | MEDLINE | ID: mdl-31525348

RESUMEN

BACKGROUND: Down syndrome (DS) is considered a risk factor for mortality associated with the Fontan operation. The objective was to show the contemporary short-term outcome of the Fontan operation for a functionally univentricular heart in patients with DS and non-DS, along with an analysis of significant predictors for in-hospital mortality. METHODS: This was a retrospective study using The Society of Thoracic Surgeons Congenital Database to assess in-hospital mortality and its predictors in patients with DS and non-DS undergoing the Fontan operation over 16 years (2001-2016). The primary outcome was in-hospital mortality. Statistical analysis was performed using univariable and multivariable logistic regression models. RESULTS: Our study cohort consisted of 12,074 patients (81 DS and 11,993 non-DS). The overall in-hospital mortality rate significantly improved in the recent era (2009-2016): 2.4% to 1.3%, P < .001. The DS group had a higher in-hospital mortality rate (12.3% vs 1.6%, P < .001) with an odds ratio of 8.6 (95% confidence interval, 4.4-17.0). The DS group had a higher 30-day mortality rate, a longer median postoperative length of stay, and a higher incidence of postoperative complications. The multivariable model showed that DS was the strongest predictor of in-hospital mortality, with an odds ratio of 11.6 (95% confidence interval, 5.1-26.4), adjusted for other significant variables including era effect, weight, and primary cardiac diagnosis. CONCLUSIONS: The in-hospital mortality for the Fontan operation significantly improved in the contemporary era. DS was a significant risk factor for in-hospital morbidity and mortality associated with the Fontan operation.


Asunto(s)
Anomalías Múltiples , Síndrome de Down/mortalidad , Procedimiento de Fontan/métodos , Predicción , Cardiopatías Congénitas/cirugía , Complicaciones Posoperatorias/epidemiología , Preescolar , Femenino , Estudios de Seguimiento , Cardiopatías Congénitas/mortalidad , Mortalidad Hospitalaria/tendencias , Humanos , Incidencia , Masculino , Estudios Retrospectivos , Factores de Riesgo , Resultado del Tratamiento , Estados Unidos/epidemiología
7.
World J Pediatr Congenit Heart Surg ; 11(4): NP125-NP128, 2020 Jul.
Artículo en Inglés | MEDLINE | ID: mdl-29506451

RESUMEN

Purulent pericarditis is a rare infectious disease with significant mortality, even in the modern antibiotic era. The presenting signs can often be subtle and patients can deteriorate rapidly with cardiac tamponade. We report a previously healthy 16-month-old female who developed purulent pericarditis associated with paronychia and sepsis caused by methicillin-sensitive Staphylococcus aureus. In addition to antibiotic treatment, she required emergent pericardiocentesis for cardiac tamponade, followed by two surgical interventions including full median sternotomy incision and partial pericardiectomy. At 4-month follow-up, she did well with no evidence of constrictive pericarditis on echocardiogram.


Asunto(s)
Antibacterianos/uso terapéutico , Paroniquia/complicaciones , Pericardiectomía/métodos , Pericardiocentesis/métodos , Pericarditis Constrictiva/etiología , Infecciones Estafilocócicas/etiología , Ecocardiografía , Femenino , Humanos , Lactante , Paroniquia/cirugía , Pericarditis Constrictiva/diagnóstico , Pericarditis Constrictiva/terapia , Infecciones Estafilocócicas/diagnóstico , Infecciones Estafilocócicas/microbiología , Infecciones Estafilocócicas/terapia
9.
J Thorac Cardiovasc Surg ; 157(4): 1577-1587.e10, 2019 04.
Artículo en Inglés | MEDLINE | ID: mdl-30770109

RESUMEN

OBJECTIVES: Improved survival after congenital heart surgery has led to interest in functional health status. We sought to identify factors associated with self-reported functional health status in adolescents and young adults with repaired interrupted aortic arch. METHODS: Follow-up of survivors (aged 13-24 years) from a 1987 to 1997 inception cohort of neonates included completion of functional health status questionnaires (Child Health Questionnaire-CF87 [age <18 years, n = 51] or the Short Form [SF]-36 [age ≥18 years, n = 66]) and another about 22q11 deletion syndrome (22q11DS) features (n = 141). Factors associated with functional health status domains were determined using multivariable linear regression analysis. RESULTS: Domain scores of respondents were significantly greater than norms in 2 of 9 Child Health Questionnaire-CF87 and 4 of 10 SF-36 domains and only lower in the physical functioning domain of the SF-36. Factors most commonly associated with lower scores included those suggestive of 22q11DS (low calcium levels, recurrent childhood infections, genetic testing/diagnosis, abnormal facial features, hearing deficits), the presence of self-reported behavioral and mental health problems, and a greater number of procedures. Factors explained between 10% and 70% of domain score variability (R2 = 0.10-0.70, adj-R2 = 0.09-0.66). Of note, morphology and repair type had a minor contribution. CONCLUSIONS: Morbidities associated with 22q11DS, psychosocial issues, and recurrent medical issues affect functional health status more than initial morphology and repair in this population. Nonetheless, these patients largely perceive themselves as better than their peers. This demonstrates the chronic nature of interrupted aortic arch and suggests the need for strategies to decrease reinterventions and for evaluation of mental health and genetic issues to manage associated deteriorations.


Asunto(s)
Aorta Torácica/cirugía , Síndrome de DiGeorge , Estado de Salud , Cardiopatías Congénitas/cirugía , Salud Mental , Autoinforme , Sobrevivientes/psicología , Adolescente , Conducta del Adolescente , Factores de Edad , Aorta Torácica/anomalías , Costo de Enfermedad , Estudios Transversales , Síndrome de DiGeorge/diagnóstico , Síndrome de DiGeorge/genética , Síndrome de DiGeorge/mortalidad , Síndrome de DiGeorge/terapia , Femenino , Conocimientos, Actitudes y Práctica en Salud , Cardiopatías Congénitas/diagnóstico , Cardiopatías Congénitas/genética , Cardiopatías Congénitas/mortalidad , Humanos , Masculino , Estudios Prospectivos , Retratamiento , Determinantes Sociales de la Salud , Factores de Tiempo , Resultado del Tratamiento , Adulto Joven
10.
Cardiol Young ; 29(3): 431-434, 2019 Mar.
Artículo en Inglés | MEDLINE | ID: mdl-30764888

RESUMEN

Coronary-pulmonary artery fistula is a rare anomaly in which an aortopulmonary collateral artery arises from a coronary artery, often seen in patients with pulmonary atresia with ventricular septal defect. In the presented case, a coronary-pulmonary artery fistula arose from the left main coronary artery and supplied blood flow to a left upper lobe segment. The life-sized three-dimensional printed model was helpful in pre-surgical planning for unifocalisation of the aortopulmonary collateral arteries.


Asunto(s)
Fístula Arterio-Arterial/cirugía , Vasos Coronarios/cirugía , Impresión Tridimensional , Arteria Pulmonar/cirugía , Procedimientos Quirúrgicos Vasculares/métodos , Fístula Arterio-Arterial/congénito , Fístula Arterio-Arterial/diagnóstico , Cateterismo Cardíaco , Vasos Coronarios/diagnóstico por imagen , Femenino , Humanos , Recién Nacido , Arteria Pulmonar/diagnóstico por imagen
12.
Ann Thorac Surg ; 108(1): e31-e34, 2019 07.
Artículo en Inglés | MEDLINE | ID: mdl-30529675

RESUMEN

Coronary artery fistula is a rare congenital cardiac anomaly. We report a 34-year-old woman who presented with a recurrent large pericardial effusion during pregnancy. She was found to have a right coronary artery to coronary sinus fistula. The coronary sinus was severely dilated due to coronary sinus ostial stenosis. Primary surgical closure of coronary artery fistula was performed with resection of coronary sinus ostial stenosis.


Asunto(s)
Fístula Arteriovenosa/cirugía , Seno Coronario/anomalías , Estenosis Coronaria/cirugía , Complicaciones Cardiovasculares del Embarazo/cirugía , Adulto , Femenino , Humanos , Embarazo
13.
Ann Thorac Surg ; 106(5): 1578-1589, 2018 11.
Artículo en Inglés | MEDLINE | ID: mdl-30031844

RESUMEN

The definition and classification of ventricular septal defects have been fraught with controversy. The International Society for Nomenclature of Paediatric and Congenital Heart Disease is a group of international specialists in pediatric cardiology, cardiac surgery, cardiac morphology, and cardiac pathology that has met annually for the past 9 years in an effort to unify by consensus the divergent approaches to describe ventricular septal defects. These efforts have culminated in acceptance of the classification system by the World Health Organization into the 11th Iteration of the International Classification of Diseases. The scheme to categorize a ventricular septal defect uses both its location and the structures along its borders, thereby bridging the two most popular and disparate classification approaches and providing a common language for describing each phenotype. Although the first-order terms are based on the geographic categories of central perimembranous, inlet, trabecular muscular, and outlet defects, inlet and outlet defects are further characterized by descriptors that incorporate the borders of the defect, namely the perimembranous, muscular, and juxta-arterial types. The Society recognizes that it is equally valid to classify these defects by geography or borders, so the emphasis in this system is on the second-order terms that incorporate both geography and borders to describe each phenotype. The unified terminology should help the medical community describe with better precision all types of ventricular septal defects.


Asunto(s)
Cardiopatías Congénitas/clasificación , Defectos del Tabique Interventricular/clasificación , Mejoramiento de la Calidad , Terminología como Asunto , Preescolar , Consenso , Femenino , Cardiopatías Congénitas/cirugía , Defectos del Tabique Interventricular/cirugía , Humanos , Lactante , Recién Nacido , Clasificación Internacional de Enfermedades , Masculino , Pediatría , Sociedades Médicas
14.
Cardiol Young ; 28(2): 261-268, 2018 Feb.
Artículo en Inglés | MEDLINE | ID: mdl-28889833

RESUMEN

OBJECTIVE: The aim of this study was to evaluate the prevalence of acute kidney injury after first-stage surgical palliation in patients with a single ventricle and to explore associated risk factors and outcomes. Design and patients This single-centre retrospective study included neonates who underwent either Norwood or Hybrid procedure from 2008 to 2015 for a single ventricle. Postoperative acute kidney injury was defined using the paediatric risk, injury, failure, loss, end-stage renal disease (pRIFLE), criteria within 72 hours of the procedure. Main results Our cohort (n=48) underwent surgical palliation at a mean (SD) age of 12 (11) days. Postoperative acute kidney injury was diagnosed in 14 (29%) patients. The prevalence of acute kidney injury in the Hybrid group was 16% and 53% in the Norwood group. Infants who developed acute kidney injury underwent surgery at younger ages [6 (5-10) versus 10 (8-16) days, p=0.016], and had a higher peak lactate level in the initial 24 hours [5.9 (4.2-9.1) versus 3.4 (2.4-6.7), p=0.007]. Norwood procedure was significantly associated with acute kidney injury [odds ratio 11.7 (95% confidence interval 1.3-101.9), p=0.03]. ICU stay [38 (21-84) versus 16 (6-45) days, p=0.038] and time to extubation [204 (120-606) versus 72 (26-234) hours, p=0.014] were longer in those with acute kidney injury. The two patients who developed early postoperative renal failure as per pRIFLE died before discharge from associated comorbidities. CONCLUSIONS: Acute kidney injury occurs in a third of the patients with single ventricle after surgical palliation but is mostly transient. Norwood, compared with Hybrid procedure, is a risk factor for postoperative acute kidney injury, which, in turn, is associated with longer ICU stay and time to extubation.


Asunto(s)
Lesión Renal Aguda/etiología , Síndrome del Corazón Izquierdo Hipoplásico/cirugía , Procedimientos de Norwood/efectos adversos , Cuidados Paliativos/métodos , Complicaciones Posoperatorias/etiología , Lesión Renal Aguda/epidemiología , Femenino , Humanos , Recién Nacido , Tiempo de Internación/tendencias , Masculino , Procedimientos de Norwood/métodos , Oportunidad Relativa , Complicaciones Posoperatorias/epidemiología , Estudios Retrospectivos , Factores de Riesgo , Estados Unidos/epidemiología
15.
Cardiol Young ; 27(10): 1872-1938, 2017 Dec.
Artículo en Inglés | MEDLINE | ID: mdl-29286277

RESUMEN

An internationally approved and globally used classification scheme for the diagnosis of CHD has long been sought. The International Paediatric and Congenital Cardiac Code (IPCCC), which was produced and has been maintained by the International Society for Nomenclature of Paediatric and Congenital Heart Disease (the International Nomenclature Society), is used widely, but has spawned many "short list" versions that differ in content depending on the user. Thus, efforts to have a uniform identification of patients with CHD using a single up-to-date and coordinated nomenclature system continue to be thwarted, even if a common nomenclature has been used as a basis for composing various "short lists". In an attempt to solve this problem, the International Nomenclature Society has linked its efforts with those of the World Health Organization to obtain a globally accepted nomenclature tree for CHD within the 11th iteration of the International Classification of Diseases (ICD-11). The International Nomenclature Society has submitted a hierarchical nomenclature tree for CHD to the World Health Organization that is expected to serve increasingly as the "short list" for all communities interested in coding for congenital cardiology. This article reviews the history of the International Classification of Diseases and of the IPCCC, and outlines the process used in developing the ICD-11 congenital cardiac disease diagnostic list and the definitions for each term on the list. An overview of the content of the congenital heart anomaly section of the Foundation Component of ICD-11, published herein in its entirety, is also included. Future plans for the International Nomenclature Society include linking again with the World Health Organization to tackle procedural nomenclature as it relates to cardiac malformations. By doing so, the Society will continue its role in standardising nomenclature for CHD across the globe, thereby promoting research and better outcomes for fetuses, children, and adults with congenital heart anomalies.


Asunto(s)
Cardiopatías Congénitas/clasificación , Clasificación Internacional de Enfermedades/historia , Pediatría , Sociedades Médicas/normas , Terminología como Asunto , Cardiopatías Congénitas/diagnóstico , Historia del Siglo XIX , Historia del Siglo XX , Historia del Siglo XXI , Humanos , Organización Mundial de la Salud
16.
Ann Thorac Surg ; 104(3): e279-e281, 2017 Sep.
Artículo en Inglés | MEDLINE | ID: mdl-28838528

RESUMEN

Cardiac lymphangioma is a rare primary benign tumor of the heart. We report a 3-year-old with cystic lymphangioma encasing the right coronary artery. Cardiac magnetic resonance imaging confirmed a intra-pericardial heterogeneous mass measuring 2.6 × 2.4 × 3.9 cm and situated right anterolateral to the ascending aorta and extending into the right atrioventricular groove. Furthermore, the right coronary artery traversed through the center of the mass. Surgical resection, on cardiopulmonary bypass, consisted of excision by skeletonizing the right coronary artery along the length of the mass. The pathology report was consistent with a lymphatic malformation. The postoperative course was uneventful without recurrence at follow-up.


Asunto(s)
Procedimientos Quirúrgicos Cardíacos/métodos , Vasos Coronarios , Neoplasias Cardíacas/diagnóstico , Linfangioma/diagnóstico , Preescolar , Diagnóstico Diferencial , Ecocardiografía , Femenino , Neoplasias Cardíacas/cirugía , Humanos , Linfangioma/cirugía , Imagen por Resonancia Cinemagnética/métodos , Tomografía Computarizada por Rayos X/métodos
20.
J Biomed Mater Res A ; 105(6): 1725-1735, 2017 06.
Artículo en Inglés | MEDLINE | ID: mdl-28198136

RESUMEN

Heparin has shown promise as a component of various biomaterial formulations, but its variable properties and inhibitory effects on some cell types have raised interest in use of dextran sulfate as an alternative. In this study, we characterized the interactions of vascular smooth muscle (SMC) and endothelial cells (EC) with heparin and dextran sulfate immobilized onto chitosan-based films. Films were modified by blending chitosan with type I collagen and covalently attaching heparin or dextran sulfate at various levels. Cell-material interactions were evaluated by quantifying cell spreading, shape and proliferation rate. ECs proliferated well on chitosan, but the polymer was a mediocre substrate for SMC growth. Immobilizing heparin on chitosan further inhibited SMC proliferation. However, blending collagen reversed the heparin inhibition of SMC growth, resulting in a pro-proliferative effect of heparin immobilized on chitosan-collagen films. Dextran sulfate surfaces supported both SMC and EC proliferation with or without the presence of collagen. The results indicate that inhibitory effects of heparin on SMC are reversed by immobilization in the presence of collagen, and that dextran sulfate may be superior to heparin as a biomaterial additive for promoting vascular cell growth in chitosan-based scaffolds. © 2017 Wiley Periodicals, Inc. J Biomed Mater Res Part A: 105A: 1725-1735, 2017.


Asunto(s)
Anticoagulantes/farmacología , Materiales Biocompatibles/química , Proliferación Celular/efectos de los fármacos , Sulfato de Dextran/farmacología , Células Endoteliales/efectos de los fármacos , Heparina/farmacología , Músculo Liso Vascular/efectos de los fármacos , Animales , Anticoagulantes/administración & dosificación , Separación Celular , Células Cultivadas , Quitosano/química , Colágeno Tipo I/química , Sulfato de Dextran/administración & dosificación , Sistemas de Liberación de Medicamentos/métodos , Liberación de Fármacos , Células Endoteliales/citología , Heparina/administración & dosificación , Músculo Liso Vascular/citología , Ratas , Porcinos
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